Can You Master the 18-Electron Rule?

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Questions and Answers

Transition metals obey the ______ rule instead of the octet rule due to the involvement of d orbitals

18-electron

Which statement is true about the electron configurations of positive ions formed by transition and post-transition elements?

  • They have noble gas valence shell electron configurations.
  • They lose electrons from the shells with the lowest value of the principal quantum number.
  • They have the same electron configuration as their respective neutral atoms.
  • They do not follow the octet rule. (correct)

In a diatomic molecule, the bond moment is the ______.

dipole moment

When transition and post-transition elements form positive ions, electrons are always lost first from the shells with the highest value of the ______ quantum number

<p>principal</p> Signup and view all the answers

Which rule replaces the octet rule for transition metals?

<p>The 18-electron rule. (B)</p> Signup and view all the answers

The dipole moment of a polyatomic molecule depends on the ______ of the molecule.

<p>geometry</p> Signup and view all the answers

Why do the atoms of transition and post-transition elements not usually obey the octet rule?

<p>Because they do not have enough electrons to achieve the noble-gas configurations. (A)</p> Signup and view all the answers

If the bond moments are equal in magnitude but opposite in direction, then they will ______ each other and the resultant dipole moment will be zero.

<p>cancel</p> Signup and view all the answers

The positive ions of transition and post-transition elements do not have the usual noble gas valence shell electron configurations of ns2np6 and are not ______ with any of the noble gases

<p>isoelectronic</p> Signup and view all the answers

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